Sort Order problem in Oracle 11g

Question

Hi,
While executing the below query in 10g and 11g, I got different results.
SELECT loan.Ins_Id,
ARev.revision,
ADet.Acc_Id,
loan.Loan_Id
FROM
Account_Det ADet
join Acc_REV ARev
on ADet.Acc_Id = ARev.Acc_Id
join LoanAcc loan
on loan.Loan_Id = ARev.Loan_Id
join Interest_Det Ins
on Ins.Ins_Id = loan.Ins_Id
where Ins.Ins_Id in ('691','707')
and ARev.revision=
(select max(revision) from Acc_REV where Loan_Id =
(select max(Loan_Id) from LoanAcc where Ins_Id =Ins.Ins_Id
) AND ADet.Acc_Id = '312'
ORDER BY TO_NUMBER(ARev.revision) ASC;
Result in Oracle 11g
INS_ID  REVISION  Acc_ID   Loan_Id
707      2      312    238
691      1      312    234
Result in Oracle 10g
INS_ID  REVISION  Acc_ID   Loan_Id
691      1      312    234
707      2      312    238
The order in both the cases were different.The order in 11g was not in ascending order.Though the data in both the databases
is same. Could anyone please tell me why is this happening?. Is there any diffeence in the architecure of ORDER BY (sort) in
10g and 11g. If I modify the above query by avoiding the subquery I get the correct result(i.e in ascending order).
SELECT loan.Ins_Id,
ADet.Acc_Id,
loan.Loan_Id
FROM
Account_Det ADet
join Acc_REV ARev
on ADet.Acc_Id = ARev.Acc_Id
join LoanAcc loan
on loan.Loan_Id = ARev.Loan_Id
join Interest_Det Ins
on Ins.Ins_Id = loan.Ins_Id
where Ins.Ins_Id in ('691','707')
and ARev.revision in ('100','101')
AND ADet.Acc_Id = '312'
ORDER BY TO_NUMBER(ARev.revision) ASC;
Edited by: KZON on Apr 7, 2011 4:46 AM

Answer 1

Hi all,
I have modified the query by giving To_Number(ARev.revision) before sub query. Now Oracle 11g returns results in ascending order. But 10g returns results in ascending order with out using To_Number()
NOte:- Type of ARev.revision is VARCHAR
SELECT loan.Ins_Id,
ARev.revision,
ADet.Acc_Id,
loan.Loan_Id
FROM
Account_Det ADet
join Acc_REV ARev
on ADet.Acc_Id = ARev.Acc_Id
join LoanAcc loan
on loan.Loan_Id = ARev.Loan_Id
join Interest_Det Ins
on Ins.Ins_Id = loan.Ins_Id
where Ins.Ins_Id in ('691','707')
and To_Number(ARev.revision)=
(select max(revision) from Acc_REV where Loan_Id =
(select max(Loan_Id) from LoanAcc where Ins_Id =Ins.Ins_Id
) AND ADet.Acc_Id = '312'
ORDER BY TO_NUMBER(ARev.revision) ASC;
Result
INS_ID  REVISION  Acc_ID   Loan_Id
691      1      312    234
707      2      312    238
Is there any difference in ORDER BY clause in Oracle11g and 10g ?
Edited by: KZON on Apr 7, 2011 4:45 AM